How does an interlock system work?

An interlock system is a device installed in a vehicle to prevent drunk driving. It works by requiring the driver to provide a breath sample before starting the vehicle. The system measures the alcohol content in the breath, and if it exceeds the programmed limit, the engine will not start. Once the vehicle is started, random retests are required at specified intervals while driving. This ensures that the driver remains sober throughout the journey. If the driver fails the retest or misses it, the interlock system will activate an alarm, and in some cases, record the event for future reference. Additionally, the system may require periodic calibration visits to ensure its accuracy. Ultimately, the interlock system provides a reliable method for preventing intoxicated individuals from operating a vehicle, increasing safety on the roads.